Need4Speed Posted January 16, 2003 Share Posted January 16, 2003 The car is producing a knocking noise coming from the n/s rear corner. I've had all the rear interior out thinking it was an internal noise but the knock is still there. I suspect it's a rear strut top mount. The handling of the car is OK. Struts are TRD Bilstein and show no signs of leaks or anything else odd. Anybody had one of these mounts fail and produce a heavy sounding knock over bumps? Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 I guess that means nobody has any experience of this then. Quote Link to comment Share on other sites More sharing options...
Mark Ayling Posted January 17, 2003 Share Posted January 17, 2003 Funny you should ask that, but I swear mine has just started doing this on the o/s rear - might just be me though... I've got the Whiteline 'The Works' kit and its only a year or so old - I'd be interested to know what it is! Quote Link to comment Share on other sites More sharing options...
Supra Pilot Posted January 17, 2003 Share Posted January 17, 2003 John, check your springs to see if they are bottoming-out, I had this, and the top coils were practically touching...... Quote Link to comment Share on other sites More sharing options...
Mark Ayling Posted January 17, 2003 Share Posted January 17, 2003 Originally posted by Supra Pilot John, check your springs to see if they are bottoming-out, I had this, and the top coils were practically touching...... I assume this isn't something that a "layman" wouldn't be able to do easily? Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 check your springs to see if they are bottoming-out No it's not a coil-binding issue and it's definitely a metal hitting metal sound. I'm taking the strut out tomorrow and checking the top-mount bearing and also the damper rod. I'll post my findings tomorrow night if all goes well. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 17, 2003 Share Posted January 17, 2003 Originally posted by John Packham No it's not a coil-binding issue and it's definitely a metal hitting metal sound. I'm taking the strut out tomorrow and checking the top-mount bearing and also the damper rod. I'll post my findings tomorrow night if all goes well. Never had top mount failure or noise onm stock mounts. Are you sure, really REALLY certain, the noise is not the hatch buffers? They sound JUST like a suspension noise? Glue on a few layers of self adhesive draught excluder foam on the buffers, see if this temporarily fixes the noise. be careful removing the old ones, the screws are Loctited in place, ask BEFORE trying to undo them if you haven't read the tricks of the trade in removing these pesky things!!! Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 I'll let you know if the stut top mount is not the problem. It really doesn't sound like tailgate problem and the sound almost matches the feel of the car - you're a racer Chris you'll understand. I'm not 100% convinced it's the strut top bearing, but I'm working through the options. If the strut proves OK I'll pursue your suggestion - and I'll be relieved that it's not a major problem. This does have me puzzled! Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted January 17, 2003 Share Posted January 17, 2003 As John knows, I've also got a knocking noise coming from the rear end. Mines a kind of dull knocking sound, more noticable on badly made roads at low speeds. It's been doing it ever since I've had the car and hasn't got worse over 20,000 miles of fairly hard road driving. I've replace the boot rubbers AND packed them with thick foam strips! Just thought I'd add my bit in case it's related in any way. Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 Cheers Matt, this is turning into a bit of a Sherlock Holmes job. Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 Chris, one last thing, this noise is there at walking pace (or less) if the ground is bumpy. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 17, 2003 Share Posted January 17, 2003 Originally posted by Matt Harwood As John knows, I've also got a knocking noise coming from the rear end. Mines a kind of dull knocking sound, more noticable on badly made roads at low speeds. It's been doing it ever since I've had the car and hasn't got worse over 20,000 miles of fairly hard road driving. I've replace the boot rubbers AND packed them with thick foam strips! Just thought I'd add my bit in case it's related in any way. Get a friendly garage to slacken and re tighten the shock stem nuts (the ones that hold the shock into the top mounts) with an air gun, sometimes they work loose, then hammer out a bigger clearance. Worth a try, happens a lot on some cars, although only seen it on MKIV's where the shocks have been off and someones attempted to retorque with a socket set, and the stem has turned with the nut, affecting the proper torque of the fastener. Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 I am the "friendly garage" Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 17, 2003 Share Posted January 17, 2003 Originally posted by John Packham Chris, one last thing, this noise is there at walking pace (or less) if the ground is bumpy. My reply to Matt seems as if it may be appropriate to you as well then Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 There are time when I feel a conference call might be simpler Quote Link to comment Share on other sites More sharing options...
Supra_Al Posted January 17, 2003 Share Posted January 17, 2003 I had this 'metallic' knocking noise.....but mine was the tailgate stoppers,which is fine now.Al. Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 17, 2003 Author Share Posted January 17, 2003 Was this a hammer type knock or a rattle type? Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted January 18, 2003 Share Posted January 18, 2003 Originally posted by John Packham I am the "friendly garage" Can I make an appointment then? - I have no air tools at all! My knock could be describes as a hammer type, although it would be a nylon hammer! Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted January 18, 2003 Share Posted January 18, 2003 John, yours in on the N/S isn't it? If it's on the O/S could it be the petrol cap if that little rubber cone has died? Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 18, 2003 Author Share Posted January 18, 2003 Give-us-a-call Signed Arthur (two compressors) Jackson Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted January 18, 2003 Author Share Posted January 18, 2003 Steve, mine is a big loose-hammer type knock - something heavy. Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted January 18, 2003 Share Posted January 18, 2003 Originally posted by Chris Wilson Get a friendly garage to slacken and re tighten the shock stem nuts (the ones that hold the shock into the top mounts) with an air gun, sometimes they work loose, then hammer out a bigger clearance. Worth a try, happens a lot on some cars, although only seen it on MKIV's where the shocks have been off and someones attempted to retorque with a socket set, and the stem has turned with the nut, affecting the proper torque of the fastener. Chris - I've got a shock in front of me, it's got a threaded rod out of the top with two sides 'flattened' Do I read your reply as if you just tighten the nut then it can turn the shaft and upset things whereas an airgun won't turn the shaft? Without an airgun would you use a pair of spanners to do it and guess/feel the tightness? So, is it slacken the nut, tap the rod on the top to settle it then propely tighten the nut? Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted January 18, 2003 Share Posted January 18, 2003 Originally posted by John Packham Steve, mine is a big loose-hammer type knock - something heavy. Not a petrol cap then . Mine is pretty noisy - much more so than any other Supra I've been it. Have you seen the two threads I've linked below? Even after that mine has a lot of background noise and is crashy over bumps. http://www.mkivsupra.net/vbb/showthread.php?s=&threadid=3769 http://www.mkivsupra.net/vbb/showthread.php?s=&threadid=3406 Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 18, 2003 Share Posted January 18, 2003 Steve: It's easier said than done to get a ring spanner on the nut and an open ended on the flats. far easier to use the inertia of the shaft against an air gun on the nyloc top nut, but you may succeed with hand tools. Just a slacken and retighten should work, you are trying to pull the stem UP into the top mount, so tapping it DOWN maybe isn't such a help. Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted January 18, 2003 Share Posted January 18, 2003 OK, makes sense, it was your "then hammer out a bigger clearance" phrase that led me that way and get it as tight as you can (without the use of obcene levers ) Quote Link to comment Share on other sites More sharing options...
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